Re: [PATCH v4 2/2] perf trace: Add --bitmask-list command-line option

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From: Aaron Tomlin

Date: Thu Jul 23 2026 - 11:34:20 EST

On Wed, Jul 22, 2026 at 10:49:33PM -0700, Namhyung Kim wrote:
> On Wed, Jul 22, 2026 at 11:50:49AM -0400, Aaron Tomlin wrote:
> > Introduce a new '--bitmask-list' command-line option for 'perf trace'.
> > When this option is specified, the formatting of cpumasks is delegated
> > to bitmap_scnprintf(), enabling cpumasks to be displayed as a condensed,
> > human-readable list (e.g., "0,2-5,7") instead of the default hexadecimal
> > representation. An example is provided below:
>
> Do you know any other places than cpumask use bitmask too? I'm just
> curious if it needs to handle other cases or not.

Hi Namhyung,

As far as I can tell, currently no other users.

Kind regards,
--
Aaron Tomlin